I found these Alta Contour pads to be very flexible, comfortable, and durable. They stand up very well to hard surfaces, I look forward to seeing how they perform innawoods. The knee pads have an excellent and durable connection system that I haven't seen before. They stood up to some serious torture testing! If you're going to be getting in the kneeling and prone positions often, I highly suggest these to reduce wear and tear on your joints.